最近搜索为空，不显示删除按钮

@@ -165,8 +165,10 @@ function isLocalStorageSupported() {
             }
 
             $history.html(html);
-            $clearHistory.removeClass('hide');
-            $historySearch.removeClass('hide');
+            if (html !== '') {
+                $clearHistory.removeClass('hide');
+                $historySearch.removeClass('hide');
+            }
             window.rePosFooter();
         }
     }